Surface Resistance Measurements

In general, materials with a low surface resistance tend to not build up electrostatic charge and thus surface resistance measurements have been an industry standard for years. There are several types of surface resistance probes. A few of the instruments in the EMPL are listed below:

· Prostat PRS-801 Resistance System
· Prostat PRS-812 Resistance Meter
· PRS-801 Resistance System
· Surface Resistance Probes (2)
· PRF-914 Resistance Fixture
· PAR-809B Variable Resistance
· ETS Series 2000 Static Control Audit Kit
· Surface Resistance Probe Model 850
· Wide Range Resistance Indicator 870A
· Resistance to Ground Tester Model 255
· ETS Surface Resistance Probe Model 850
· ETS Resistance/Resistivity Model 823

Volume Resistivity Measurements

The Chilworth Volume Resistivity Kit can measure the volume resistivity (W m) of a soil or powder. With an applied voltage, the current can be measured and the volume resistivity r = V/I * 0.4 can be calculated. With r less than 1.0 e6 W m the soil is said to be conductive in electrostatic terms and materials having a r greater than 1.0 e10 W m are considered insulating. In between they are said to be antistatic.